Anti-Fake Material Distributed with Anti-Fake Fibers Having Visual Characteristics Incapable of Being Simulated Via Printing

ABSTRACT

An anti-fake material is disclosed. Anti-fake fibers ( 2 ) are distributed on the anti-fake material. Part surfaces ( 3 ) of the anti-fake fibers ( 2 ) are presented on the surface ( 1 ) of the anti-fake material ( 1 ), wherein said part surface ( 3 ) have concave-convex sheltering structure, and at lease two color patterns (A B) are distributed on the surfaces. Said at least two color patterns (A  B) have distinct visual difference on the said part surface ( 3 ), resulting that the color patterns (A  B) can be seen respectively from the surface ( 1 ′) of the anti-fake material ( 1 ) when observed from different angle of the part surfaces ( 3 ). Due to the visual difference according to the present invention is formed by shielding the patterns distributed on the part surfaces ( 3 ) of the anti-fake fibers ( 2 ) in the anti-fake material with the concave-convex sheltering structure, the exact printing is unable to imitate the three-dimensional structure. Therefore, the present invention is capable of effectively preventing imitate of printing.

TECHNICAL FIELD

This invention relates to an anti-fake material, such as anti-fakepaper, or anti-fake film, or anti-fake package, especially an anti-fakematerial distributed with anti-fake fiber, which has visualcharacteristic that cannot be simulated by printing.

BACKGROUND

The anti-fake paper made by adding colored fiber into paper has a longhistory of nearly one hundred years, which has been used in manycountries for producing paper money up to now, and also formanufacturing valuable securities, receipts, product's specifications,printing labels and etc; and fluorescent fiber has been specially usedin manufacture of almost all paper monies. In short, there are two kindsof anti-fake fibers generally, one is single fiber in one color andother is single fiber with several colors. Chinese patent CN02168121.0(An anti-fake fiber) revealed a single fiber with several colors ofsections, that is, there are at least two colors along with its lengthdirection. Other Chinese patent CN02170092.4 (An anti-fake fiber and ananti-fake paper made thereof) released a fiber with different colors inits upper and down surfaces, that is, the fiber's cross section is ovaland there are two surfaces, upper and down, corresponding to the oval,there is obvious color difference between two surfaces. When such fiberis added into paper pulp to manufacture anti-fake paper, the uppersurface and the down surface of the oval fiber will be parallel to thepaper surface under interaction with the paper fiber. If the paper isthin or transparent and when one fiber in the paper is observed, its onecolor is on one surface of the paper and its other color is on the othersurface of the paper. But shortcoming of the colored fiber mentionedabove is that: its visual effect can be simulated by printing thin line,and if it is necessary to preciously distinguish whether it is a fiberor a printed thin line, the only way is to tear the paper or to pick itout with a needle for further observing. It is not only inconvenient,but also impossible for valuable paper money, securities and etc.because such method will destroy them. Therefore, such anti-fake effectis limited and a faker can almost easily get by under false pretenceswhen simulating by printing thin line.

Chinese patent CN02146589.4 (An anti-fake material and an anti-fakedocument made thereof) revealed an anti-fake fiber that is a filamenthaving axial length and round or about round cross section, with itscharacteristics of that: the said filament has two or more colors in itscross section, and axial colored part for each of the said colorsstretches axially in spiral status. If observing in any changing angle,common person cannot eye-visually find changes of the colored pattern onthe fiber; therefore, it is almost a visual characteristic of a flatpattern and can be successfully simulated by precious printing methodwithin eye-distinguishable accuracy.

DETAILED DESCRIPTIONS OF THIS INVENTION

The objective of this invention is to offer an anti-fake material thathas anti-fake fiber distributed on it, from which different colorpatterns can be observed by changing the observing angle to the fiberand of which its visual characteristics cannot be simulated by currentprinting technologies.

Another objective of this invention is to offer an anti-fake fiber. Whenits special part surface is presented on at least one surface of theanti-fake material, on the surface the observer can respectively andseparately see different color patterns on this special part fromdifferent observing angles. Therefore, if it is used in anti-fakematerial, current printing technology has no way to simulate.

This invention also provides several anti-fake fibers, the surface ofspecial part of these anti-fake fibers can naturally present on at leastone surface of the anti-fake material in the process of the anti-fakematerial manufacture. This special part makes observer respectively andseparately see the different color patterns on the special part fromdifferent observing angles on the surface. Therefore, if it is used inanti-fake material, current printing technology has no way to simulate.

The first objective of this invention is realized by that: an anti-fakematerial, on which anti-fake fiber is distributed; part surface of thesaid anti-fake fiber is presented on the surface of the said anti-fakematerial with characteristics of that: the said part surface has itsconcave-convex shielding structure on it, on which there are at leasttwo color patterns A and B distributed, the said at least two colorpatterns A and B on the said part surface have obvious visualdifference, therefore on the anti-fake material's surface with presenceof the said part surface, when observing the said part surface fromdifferent observing angles, the color patterns A and B can be seenrespectively.

The at least two color patterns on the anti-fake fiber distributed inthe anti-fake material revealed in this invention include color patternsappeared under visible light, UV-ray, IR-ray and other invisible rays.For the color patterns appeared under visible light, the anti-fakematerial of this invention can perform the first-level anti-fakeidentification, that is the public anti-fake identification; for thecolor patterns appeared under UV-ray, IR-ray and other invisible rays,they can be judged by using special tools to perform the second-levelanti-fake identification. Because very thin anti-fake fiber (generally,the diameter of the fiber is smaller than 100 μm) is distributed in theanti-fake material in this invention, on which the concave-convexshielding structure is arranged, and the concave-convex shieldingstructure is located on the said part surface of the anti-fake fiber andthis part surface can be presented on at least one surface of theanti-fake material, there is obvious visual difference between the saidat least two color patterns on the said part surface, therefore, becauseof the shielding of the concave-convex structure, observer canrespectively and separately see the color patterns on the part surfacefrom different observing angles on the surface of the anti-fakematerial, by which the anti-fake effect can be realized. Because suchvisual difference is caused by using the concave-convex shieldingstructure to shield feature of the patterns distributed on the partsurface of the anti-fake fiber in the anti-fake material, no matter howprecious they are, printing technologies have no way to simulate suchstereo structure, thus, this invention can efficiently prevent anysimulation by printing technologies.

The visual difference is in diversity, which is produced by colorpatterns being respectively and separately seen due to the at least twocolor patterns on the anti-fake fiber distributed in the anti-fakematerial revealed in this invention being shielded by the concave-convexshielding structure, it could be that: there are at least two observingangles a and b existed on the anti-fake material surface with presenceof the said part surface, the color pattern A can be seen if observingthe said part surface of the anti-fake fiber from the observing angle abut the pattern B cannot be seen because it is shielded by theconcave-convex shielding structure on the part surface of the anti-fakefiber, and the color pattern B can be seen if observing the said partsurface of the anti-fake fiber from the observing angle b but thepattern A cannot be seen because it is shielded by the concave-convexstructure on the part surface of the anti-fake fiber; it could also be adifferent visual effect formed by one color pattern shieldedincompletely but other color pattern feature shielded completely; inaddition it could be a jumped visual conversion along with fiber lengthdirection caused by shielding. In embodiments, each of the differenceswill be further explained in detail based on their figures.

The other objective of this invention is realized by that: an anti-fakefiber inserted into the said anti-fake material, which has a partsurface able to be presented on one surface of the said anti-fakematerial, with characteristics of that: the said part surface has aconcave-convex shielding structure on it, at least two color patterns Aand B are distributed on the part surface, the color patterns A and Bhave obvious visual difference on the said part surface to make personrespectively see the color patterns A and B if observing the said partsurface from different observing angles on the anti-fake material withpresence of the said part surface. Because of the concave-convexshielding structure arranged on the anti-fake fiber in this inventionand the concave-convex shielding structure arranged on the part surfaceof the anti-fake fiber able to be presented on one face of the anti-fakematerial, and because of shielding by the concave-convex shieldingstructure, observer can respectively and separately see this specialpart from different angles on the special surface—the color patternswith visual difference on the part surface. Thus, if it is used inanti-fake material, such visual difference caused by its stereostructure cannot be simulated by current printing technologies.

In fact, the purpose of this invention to naturally present the specialpart of the anti-fake fiber on at least one surface of the anti-fakematerial is to control certain surface of the anti-fake fiber towards tovisible surface of the anti-fake material. On the basis of theoreticalanalysis and practical experiment, the anti-fake fiber surface parallelto the maximum projection of the anti-fake fiber can naturally presenton at least one surface of the anti-fake material, there are three waysto realize it: first method is to coat a flat transparent material onthe outside of the anti-fake fiber, and simultaneously to arrange thesaid part surface of the anti-fake fiber towards to the flat surface ofthe transparent material, in this way, the flat surface of the flatfiber can naturally be parallel to the visible surface of the anti-fakematerial to make the needed part surface present on the visible surfaceof the anti-fake material. The second method is to bend or crook theanti-fake fiber, simultaneously with certain toughness, and to locatethe said part surface on the bended or crooked outside surface, in thisway, the anti-fake fiber can be presented on the visible surface of theanti-fake material in its self-bended or crooked status. The thirdmethod is to make the cross section of whole or part length of theanti-fake fiber into flat shape, to locate the said part surface of theanti-fake fiber onto the flat surface at the flat cross section part oron the anti-fake fiber's surface having the same direction as the flatsurface. For the fiber with its full length in flat cross section, theflat surface can be towards to the visible surface when naturally addinginto the anti-fake material; for the fiber with its part length in flatcross section, the flat part can be towards to the visible surface, itsother part with the same direction corresponded to the flat surface cannaturally follow towards to the visible surface.

DRAWING DESCRIPTION

FIG. 1 is a drawing of this invention's schematic structure;

FIG. 2 a-FIG. 2 b are drawings of color patterns A and B distributedalong with length direction of the anti-fake fiber and in parallelarrangement in the anti-fake fiber,

FIG. 2 a A plane drawing,

FIG. 2 b A cross section drawing.

FIG. 3 is a drawing of color patterns A and B distributed on theanti-fake fiber in parallel arrangement but in slope with lengthdirection of the anti-fake fiber;

FIG. 4 is a side-viewing drawing of color patterns A and B on theanti-fake fiber distributed along with length direction of the anti-fakefiber,

FIG. 5 a-FIG. 5 g are status drawings of color patterns A and B on theanti-fake fiber distributed radially, extended axially and at differentpositions in length direction;

FIG. 6 a-FIG. 6 b are drawings of single-triangle cross section of theanti-fake fiber in the anti-fake material, of which:

FIG. 6 a Cross section drawing;

FIG. 6 b Plane drawing.

FIG. 7 a-FIG. 7 c are drawings of double-linked triangle cross sectionof the anti-fake fiber in the anti-fake material, of which:

FIG. 7 a Cross section drawing;

FIGS. 7 b and 7 c Plane drawings.

FIG. 8 a-FIG. 8 b are drawings of single-quadrilateral cross section ofthe anti-fake fiber in the anti-fake material, of which:

FIG. 8 a Cross section drawing;

FIG. 8 b Plane drawing.

FIG. 9 a-FIG. 9 c are drawings of three-linked quadrilateral crosssection of the anti-fake fiber in the anti-fake material, of which:

FIG. 9 a Cross section drawing;

FIGS. 9 b and 9 c Plane drawings.

FIG. 10 a-FIG. 10 d are drawings of trapezoid cross section of theanti-fake fiber in the anti-fake material, of which:

FIG. 10 a and 10 b Cross section drawings;

FIG. 10 c and 10 d Plane drawings.

FIG. 11 a-FIG. 11 f are drawings of the anti-fake coated withtransparent material in the anti-fake material, of which:

FIG. 11 a and 11 b Drawings of single-triangle cross section andsingle-quadrilateral cross section of the anti-fake fibers coated withround transparent material;

FIG. 11 c and 11 d Drawings of single-triangle cross section andsingle-quadrilateral cross section of the anti-fake fibers coated withflat transparent material;

FIGS. 11 e and 11 f Drawings of multi-triangle cross section andmulti-quadrilateral cross section of the anti-fake fibers coated withflat transparent material.

FIG. 12 a-FIG. 12 e are cross section drawings for an Al vacuum-coatedshielding layer between color patterns A and B of the anti-fake fiber,of which:

FIG. 12 a Drawing of triangle cross section with Al-coated layer in themiddle of the material;

FIG. 12 b Drawing of triangle cross section with Al-coated layer on thematerial surface;

FIG. 12 c Drawing of quadrilateral section with Al-coated layer in thematerial;

FIG. 12 d Drawing of quadrilateral section with Al-coated layer on thematerial surface;

FIG. 12 e Drawing of multi-linked triangle section with Al-coated layeron the same visual surface of the material.

FIG. 13 is a cross section drawing of the anti-fake fiber with curveside of the cross section in this invention;

FIG. 14 a, FIG. 14 b and FIG. 14 c are drawings for minimum square areasof the anti-fake fibers in different shapes;

FIG. 15 a and FIG. 15 b are drawing of the bended anti-fake fibersdistributed in the anti-fake material in this invention;

FIG. 16 is a front-viewing drawing of partial section of the anti-fakefiber in flat shape.

EMBODIMENTS OF THE INVENTION

FIG. 1 shows one enlarged anti-fake fiber 2 distributed in the anti-fakematerial 1, the part surface 3 of the anti-fake 2 is presented on thesurface 1′ of the anti-fake material, the part surface 3 has itsconcave-convex shielding structure on it, in this Figure theconcave-convex shielding structure is constituted of triangle elementcontained in the cross section 4 of the anti-fake fiber 2, its top angleand its bevel side's surface of the triangle element constitutes aconcave-convex shielding structure, surfaces 3′ and 3″ of these twobevel sides constitute the part surface 3, the color pattern A isdistributed on the surface 3′ and the color pattern B on the surface 3″,if observing the part surface 3 from different observing angles on thesurface 1′ of the anti-fake material 1, it is possible to respectivelyand separately see the color patterns A and B, for example, if observingfrom a, it is possible to see the color pattern A, and from b to see thecolor pattern B, because of the difference between the color patterns Aand B, an obvious visual difference is resulted in. The color patterns Aand B can be respectively or jointly distributed on the surfaces 3′ and3″ fully to make more obvious visual difference. If observing the partsurface 3 from different observing angles on the surface 1′ of theanti-fake material 1, if observing the part surface 3 from a to b in thedirection vertical to the anti-fake fiber 2, there is at least anobserving angle c located between two color patterns A and B, from whicheither the color pattern A or the color pattern B can be seen, becausethe anti-fake fiber 2 is very thin generally, therefore an patterncombined by the color patterns A and B can be seen generally from theobserving angle c.

The at least two color patterns on the anti-fake fiber distributed inthe anti-fake material revealed in this invention include color patternsbeing able to appear under visible light, UV-ray, IR-ray and otherinvisible rays. For the color patterns appeared under visible light, theanti-fake material of this invention can perform the first-levelanti-fake identification, that is the public anti-fake identification;for the color patterns appeared under UV-ray, IR-ray and other invisiblerays, they can be judged by using special tools to perform thesecond-level anti-fake identification. Because very thin anti-fake fiber2 (generally, the diameter of the fiber is smaller than 100 μm) isdistributed in the anti-fake material 1 in this invention, on which theconcave-convex shielding structure is arranged, and the concave-convexshielding structure is located on the said part surface 3 of theanti-fake fiber and this part surface 3 can be presented on at least onesurface of the anti-fake material, therefore, because of the shieldingfunction of the concave-convex structure, observer can respectively andseparately see the different color patterns on the part surface fromdifferent observing angles on the surface of the anti-fake material withresults of obvious visual difference, by which the anti-fake effect canbe realized. Because such visual difference is caused by using theconcave-convex structure to shield the feature of the patternsdistributed on the part surface of the anti-fake fiber in the anti-fakematerial, that is, realization of the objectives mentioned above isdepended on shielding light effect from different angles by the preciousconcave-convex structure on the fiber surface, thus all of the currentprinting technologies (including printings such as litho, perforating,gravure, letterpress, jetting, copying and etc.) have no way topreciously simulate such stereo structure, thus, this invention canefficiently prevent any simulation by printing technologies.

The visual difference of this invention is in diversity:

The at least two color patterns A and B of the anti-fake fibersdistributed in the anti-fake material in this invention are shielded bythe concave-convex structures and are able to be respectively seen toresult in a visual difference that is in diversity, such visualdifference is related with different visions caused by the colorpatterns differently distributed on the part surface of the anti-fakefibers with different concave-convex shielding structures located on it.

The embodiment shown in FIG. 1 indicates a color pattern distributionthat can be completely shielded by the concave-convex structure witheach other, because of the shielding structure extended along withlength direction of the anti-fake fiber 2, thus only can the differentvisions vertical to the length direction of the anti-fake fiber bemarkedly changed under shielding. Because the anti-fake fiber 2 is avery thin and fine, it is recommended to have the maximum cross sectiondiameter of the anti-fake fiber not over than 0.25 mm, thus visiblewidth of the anti-fake fiber, if observing vertically to the lengthdirection of the anti-fake fiber 2, is very limited, so when convertingfrom observing angle a to observing angle b, an obvious visualdifference can be produced only if there is difference between the colorpatterns A and B, it is the only way for such difference possibly feltby common person. It is the merit of this embodiment to make normaleyesight feel large change only based on difference between the colorpatterns A and B, preferably this difference is only in differentcolors, but also could be in the same color but in different patterns,and in addition also could be different both in color and pattern. Inthis embodiment, there are at least two observing angles a and b existedon the surface 1′ of the anti-fake material 1, the color pattern A canbe seen if observing the said part surface of the anti-fake fiber fromthe observing angle a, but the color pattern B cannot be seen because itis shielded by the concave-convex triangle structure on the part surface3 of the anti-fake fiber 2; and the color pattern B can be seen ifobserving the said part surface 3 of the anti-fake fiber 2 from theobserving angle b, but the color pattern A cannot be seen because it isshielded by the concave-convex triangle structure on the part surface 3of the anti-fake fiber 2; for the second-level anti-fake by usingfluorescent fiber, IR fiber and etc., that is, observing by using tools,this embodiment may unnecessarily be limited by the difference betweenthe color patterns A and B, for example, the color patterns A and B canbe completely the same ones within normal eyesight scope but one of themshall be treated by certain invisible ray, in this way, the visualdifference between them can be seen by using special tools able todistinguish this invisible ray, thus the anti-fake effect can berealized. In this embodiment, the concave-convex shielding structure isarranged on the part surface 3 of the anti-fake fiber 2 in a way to forma pattern completely separated between the color patterns A and Bwithout any overlapping with each other, thus a vision effect ofshielding each other is realized.

The obvious visual difference of the at least two patterns A and B onthe part surface 3 can also have a different visual effect formed by onecolor pattern A unable to be shielded completely and other color patternB able to be shielded completely, such visual effect is often resultedby incorporate relationship of the color patterns, for example, thecolor pattern A is completely or partly incorporated in the colorpattern B, that is, if observing the part surface 3 of the anti-fakefiber from observing angle a, the eyesight can only see the colorpattern A because the concave-convex shielding structure on the partsurface 3 of the anti-fake fiber shields the color pattern B completely;if observing the part surface 3 of the anti-fake fiber from observingangle b, the eyesight can see the color pattern B because of theconcave-convex shielding structure on the part surface 3 of theanti-fake fiber, but the color pattern A is completely or partly notshielded. The color patterns A and B for forming such visual differencemust be different; at least the colors of their color patterns aredifferent in order to produce strong visual difference.

It also could be a visual difference produced when they are all notshielded completely, in this case, the color patterns A and B could betwo patterns with their some parts overlapped partly, that is, ifobserving the part surface 3 of the anti-fake fiber from observing anglea, the eyesight can see that the color pattern A only shields a part ofthe color pattern B because of the concave-convex shielding structure onthe part surface 3 of the anti-fake fiber; if observing the part surface3 of the anti-fake fiber from observing angle b, the eyesight can seethat the color pattern A only shields a part of the color pattern Bbecause of the concave-convex shielding structure on the part surface 3of the anti-fake fiber. Therefore, though the A and B are not shieldedcompletely, their relative parts have been shielded. Because of human'slimited eyesight resolution, the pattern in human's eyes could be acomposed pattern incorporated a part of the color pattern B into thecolor pattern A, but not a pattern simply incorporated the color patternB fully into the color pattern A or simply incorporated the colorpattern A fully into the color pattern B. The patterns A and B forproducing obvious visual difference shall be different, at least withdifferent color feature.

It could also be a visual difference produced by jumped visualconversion along with length direction of the anti-fake fiber caused byshielding, because human has its longer eyesight along with lengthdirection of the anti-fake fiber (the best length of the anti-fake fiberis not more than 15 mm, which can give much longer eyesight incomparison with its width of 0.2 mm), thus, when the at least two colorpatterns A and B are distributed at different positions along with thelength direction of the anti-fake fiber (unlike that distributed axiallyas shown in the FIG. 1), the jumped visual change can be produced, whichwill be explained in detail in the following embodiments. This visualchange has relative lower requirements on the color patterns, that is,the color patterns could be the same and the jumped visual change can beproduced, provided there is obvious visual difference at the positionalong with the length direction of the anti-fake fiber.

The color pattern's diversity of this invention and its formed visualeffects:

At least two color patterns A and B could be the patterns composed ofvarious single colored or multi-colored lines. Because the anti-fakefiber in this invention is very thin and fine, for the more practicalfirst-level anti-fake identification, the more simple and direct it is,the more valuable it will be. Because the color feature is the easiestone for human to identify, so thereafter, two color patterns A and B indifferent colors will be explained in details.

See FIG. 1, the color pattern A and the color pattern B are colored lineA and colored line B in parallel and with different color features, forexample the colored line A is in red and the colored line B is in blue,if observing the part surface 3 of the anti-fake fiber from observingangle a, only can the red line be seen, but the blue line cannot be seenbecause it is shielded by the concave-convex shielding structure on thepart surface 3 of the anti-fake fiber, thus the common person feels thatthe fiber is in red; if observing the part surface 3 of the anti-fakefiber from observing angle b, only can the red line be seen, but theblue line cannot be seen because it is shielded by the concave-convexshielding structure on the part surface 3 of the anti-fake fiber, thusthe common person feels that the fiber is in red; if observing the partsurface 3 of the anti-fake fiber from observing angle c, both of the redline and the blue line can be simultaneously seen, because the coloredlines are very close with each other, the common person can only feel acomposed effect of the red line and the blue line, that is, the fiber issomewhat in black.

In the embodiment shown in FIG. 1, the colored line A and the coloredline B with different color features but in parallel are also parallelwith the length direction of the anti-fake fiber. If its observing angleis changed, the full fiber will change its color from red to blue withunique visual conversion effect. The converting angle from the angle ato the angle b should preferably be not more than 120 degree. In thisvisual feature design, the most obvious color change of the fiberhappens when observing the fiber surface with changing angle at theposition vertical to the length direction of the fiber.

FIG. 2 a and FIG. 2 b show the composed effect of A1, A2, A3 colors andthe composed effect of B1, B2, B3 colors respectively to make thepattern A and the pattern B with different color features and inparallel. The colors A1-A3 and the colors B1-B3 are respectively instrip shape and vertical to the length direction of the anti-fake fiber.In this visual feature design, the most obvious color change of thefiber happens when observing the fiber surface with changing angle atthe position along with the length direction of the fiber.

FIG. 3 shows the composed A1, A2, A3 colors and the composed B1, B2, B3colors respectively to make the pattern A and the pattern B withdifferent color features and in parallel. The colors A1-A3 and thecolors B1-B3 are respectively in strip shape and with a cross angle of0˜90° to the length direction of the anti-fake fiber. In this visualfeature design, the most obvious color change of the fiber happens whenthe observing position is first in slope with the length direction ofthe fiber, and then the observing angle is changed to observe thefiber's surface.

The color pattern A and the color pattern B are the same in theirpatterns and also color features, but the color pattern A and the colorpattern B have their different positions on the length direction of theanti-fake fiber, see FIG. 4. For example, the color pattern A and thecolor pattern B are all in black, the color pattern A is located infront part of the fiber and is composed of A1, A2, A3 colors and thecolor pattern B is located in rear part of the fiber and is composed ofB1, B2, B3 colors, when changing the observing angle, the full fiberhappens its position move in jumped style with unique visual conversioneffect.

FIG. 5 a-FIG. 5 g show the situations of the color pattern A and thecolor pattern B distributed radially, extended axially but havingdifferent positions in the length direction of the fiber. The colorpattern A and the color pattern B could be have their positions, fullyoverlapped, or partly overlapped, or partly lined, or separated witheach other, in the length direction of the anti-fake fiber. FIG. 5 a:the color pattern A in strip shape is red in color and the color patternB in strip shape is black in color, if the positions of the colorpattern A and the color pattern B are fully overlapped axially, whenchanging angle to observe, the full fiber changes color from red toblack, the fiber's position does not move visually, having unique visualconversion effect; FIG. 5 b: if the positions of the color pattern A andthe color pattern B are partly overlapped axially, when changing angleto observe, visually the full fiber changes color from red to black andhappens jumped position move, but the jumping is small, having uniquevisual conversion effect; FIG. 5 c: if the axial positions of the colorpattern A and the color pattern B are linked, when changing angle toobserve, visually the full fiber changes color from red to black andhappens jumped position move, but the jumping is in form of head linkedto tail; FIG. 5 d: if the axial positions of the color pattern A and thecolor pattern B are separated, when changing angle to observe, visuallythe full fiber changes color from red to black and happens jumpedposition move, but the jumping is in leaping style, having unique visualconversion effect.

FIG. 5 e shows the situation of the color pattern A and the colorpattern B composed of different colors, its color could be asingle-color, or a composition of multi-colors. For example, the colorpattern A in strip shape is composed of two lines in different colorswith head linked to tail, one line is red A1 and other line is green A2;the color pattern B is a black line, when changing angle to observe,visually the full fiber changes its color from double-color of red/greento single color of black, having unique visual conversion effect.

The color of the color pattern could be white, or blank, or the samecolor as that on the surface of the anti-fake fiber. In FIG. 5 f, if thecolor pattern A in strip shape is red, and the color pattern B in stripis white and is distributed on the full convex surface 3″ of theanti-fake fiber, if the surface of the anti-fake material is in white,when changing angle to observe, the whole fiber changes from red toinvisible status, having unique visual conversion effect. If the colorpattern A in strip shape is black, and the color pattern B in strip isyellow and is distributed on the full convex surface 3″ of the anti-fakefiber, if the surface of the anti-fake material is in yellow, whenchanging angle to observe, the whole fiber changes from black toinvisible status, having unique visual conversion effect. Therefore, ifthe color of the color pattern B is in the same color as that on thesurface of the anti-fake material, the cross section of the fiber can bedesigned to part or full color pattern B incorporated into the colorpattern A visually, but the color pattern A cannot be incorporated intothe color pattern B, see FIG. 5 g.

In this invention, the concave-convex shielding structure is indiversity:

The concave-convex shielding structure is composed of a cross section ofthe anti-fake fiber, having at least one triangle element, the triangleelement refers to a cross section structure with at least one top angleand two sides corresponded to it, its typical structure is a trianglesection, but also can be a quadrilateral section or polygon's section.The cross section in FIG. 1 is a triangle, the color pattern A islocated on face 3′ related to one bevel side of the triangle and thecolor pattern B is located on face 3″ related to another bevel side ofthe triangle. The triangle is a typical concave-convex shieldingstructure to realize one color pattern presented and other color patternshielded, and is also easy to meet the requirement of converting anglepreferably not over than 120° when converting observation from the anglea to the angle b.

The concave-convex shielding structure is composed of multi-triangles inparallel, the composition of all the color patterns on the relativebevel side of each triangle constitutes the color pattern A and thecomposition of all the color patterns on the another relative bevel sideof each triangle constitutes the color pattern B. Because the fiber isvery thin and fine, the concave-convex shielding structure made ofsingle triangle is difficult to present on the surface of the anti-fakematerial just in a form of its top angle upwards, for this reason thetriangle has to be made in flat form, but for such flat triangle, itssensitivity of the color pattern conversion is lower when changing itsobserving angle, and the color pattern A or the color pattern B is verythin and fine when the fiber is in certain width, which influences thevisual effect. Therefore, the parallel-triangle composition design inthis invention can overcome the above shortcoming.

FIG. 6 a-FIG. 6 b are the drawings for the anti-fake fiber 2 withsingle-triangle cross section in the anti-fake material 1, of which FIG.6 a is a cross section drawing and FIG. 6 b is a plane drawing. There isthe color pattern A and the color pattern B on a slope relative to twosides of the triangle, because of the anti-fake material with certaintransparency, the color pattern A and the color pattern B presented onthe surface of the anti-fake material is visible for eyes, whenobserving from angle a the color pattern A can be seen but the colorpattern B cannot because it is shielded by the convex structure of thetriangle, it is the same when observing from angle b the color pattern Bcan be seen but the color pattern A cannot because it is shielded by theconvex structure of the triangle. In addition, the anti-fake fiber 2 inthe anti-fake material 1 is bended along with a equally-dividing axisbetween the said two sides, which ensures that: either both of surface Aand surface B are presented simultaneously on the surface of theanti-fake material, or the surface corresponded to third side 6 ispresented alone on the surface of the anti-fake material. Here, to bendalong with the equally-dividing axis 5 is the key matter for accuratelycontrolling the surface of the fiber with A and B on it simultaneouslyupwards, in fact the equally-dividing axis is a virtual controlling axisthat plays the same role in the all of the following drawings as that inFIG. 6 series, its objective is to present the color pattern A and thecolor pattern B simultaneously on the surface of the ant-fake material1. The color of the surface corresponded to the third side 6 of thecross section is in white or the same as that on the surface of theanti-fake material 1. Main reasons for selecting this triangle structureare based on three aspects as follows:

1. Generally speaking, when the width of a colored line is less than 30μm, it is hard for eyes to observe, but a triangle structure with thesame fiber height has its feature of larger colored area visible byeyes, when the thickness of paper or plastic film is thinner, it isimpossible for fiber's height to be larger than thickness of paper orplastic film, generally the thickness of money paper is not over than 90μm and the thickness of copy paper is not over than 80 μm, thus if fiberis necessary to be added into the paper in such thickness, the one withtriangle structure is the best choice; 2. In comparison withquadrilateral cross section, the triangle cross section has betterstability and can ensure the color patterns A and B homogeneouslypresented on the surface of the anti-fake material under certain formingpress in the process of paper making; 3. One feature of the trianglestructure is that the color pattern on the surface corresponded to side6 can also potentially present on the surface of the anti-fake materialalone, because of no concave-convex structure on this flat surface, itis impossible to produce the visual difference caused by changingobserving angle, thus for avoiding such situation, we prepare the colorpattern on this surface in white or in the same color as that of thesurface of the anti-fake material, thus when this color pattern ispresented on the surface of the anti-fake material, this problem can besolved because of the presented fiber's surface in white or in the samecolor as that of the surface of the anti-fake material, which isinvisible for eyes.

FIG. 7 a-FIG. 7 c are the drawings for the anti-fake fiber withdouble-linked triangle cross section in the anti-fake material, of whichFIG. 7 a is a cross section drawing, and FIG. 7 b and FIG. 7 c are theirplane drawings. Because the anti-fake material has certain transparency,the triangle color pattern A and the triangle color pattern B presentedon the surface of the anti-fake material are visible by eyes, whenobserving from angle a, the color pattern A (as a composed visual effectof A1+A2) can be seen but the color pattern B cannot be seen because itis shielded by the triangle; vice versa, when observing from angle b,the color pattern B (as a composed visual effect of B1+B2) can be seenbut the color pattern A cannot be seen because it is shielded by thetriangle. In addition, the fiber in the anti-fake material can be bendedalong with the equally-dividing axis 5 (see FIG. 3 b) and can also be ina straight line (see FIG. 3 c), thus it can ensure that: either thesurface with the color pattern A located on it and the surface with thecolor pattern B located on it are simultaneously presented on thesurface of the anti-fake material 1, or the surface corresponded to theside 6 is presented on the surface of the anti-fake material 1 alone. Weprepare the color pattern on the surface corresponded to the side 6 inwhite or in the same color as that of the surface of the anti-fakematerial 1. The actual effects of the structure are: 1. In comparison tosingle-triangle, there is larger visual area when their fiber heightsare the same, thus it is possible to be used into a very thin paper, forexample the paper's thickness is less than 50 μm; 2. Because of thefiber in flat form totally, when the fiber is shorter in its length withcertain hardness, the fiber even if unnecessary to be bended can alsoensure that: either the surfaces with the color patterns A and B locatedon them present on the surface of the anti-fake material 1simultaneously, or the surface corresponded to the side 6 presents onthe surface of the anti-fake material 1.

FIG. 8 a-FIG. 8 b are the drawings for the anti-fake fiber 2 withsingle-quadrilateral cross section in the anti-fake material 1, of whichFIG. 8 a is a cross section drawing and FIG. 8 b is a plane drawing. Incomparison with single-triangle shown in FIG. 6 series, the anti-fakefiber 2 is bended along with the equally-dividing axis 5, its visualarea in the anti-fake material 1 is reduced by one half if the fiber'sheight is the same, but its merit is that: either which surface (eitherthe surface with the color patterns A and B located on, or the surfacewith the color patterns A′ and B′ located on) is upwards, the fiber canall show color-change effect if the visual angle is changed. It is oneof the selections for the paper or film with larger thickness.

FIG. 9 a-FIG. 9 c are the drawings for the anti-fake fiber 2 withthree-linked quadrilateral cross section in the anti-fake material 1, ofwhich FIG. 9 a is a cross section drawing, and FIG. 9 b and FIG. 9 c aretheir plane drawings. In comparison to single-quadrilateral shown inFIG. 8 series, it has larger visual area if their fiber heights are thesame. Because of the fiber in flat form totally, when the fiber isshorter in its length with certain hardness, the fiber even ifunnecessary to be bended can also ensure that the color pattern A(composed of A1, A2 and A3) and the color pattern B (composed of B1, B2and B3) present on the surface of the anti-fake material simultaneously.

FIG. 10 a-FIG. 10 d are the drawings for the anti-fake fiber withtrapezoid cross section in the anti-fake material, of which FIG. 10 aand 10 b are their cross section drawings, and FIG. 10 c and FIG. 10 eare their plane drawings. The trapezoid has better stability, eventhough the surfaces with the color patterns A and B located on are invery sloped status (the more inclined it is, the much higher sensitivitywill be), it is still very stable, especially when the fiber is shorterin its length with certain hardness, the fiber even if unnecessary to bebended can also ensure that the color pattern A and the color pattern Bpresent on the surface of the anti-fake material simultaneously (seeFIG. 10 c). FIG. 10 a shows a trapezoid, in comparison withtwo-trapezoid composition shown in FIG. 10 b, its merit is that thefiber's height in the paper is much smaller, in FIG. 10 a the color ofthe surface corresponded to the side 6 is in white or in the same coloras that of the surface of the anti-fake material 1; but compared withFIG. 10 a, the arrangement shown in FIG. 10 b can produce color-changingeffect regardless of which surface upwards and when changing itsobserving angle, so it is an alternation for paper or film with largerthickness; the surface corresponded to bottom side 6 of the trapezoidshown in FIG. 10 a is in white or in the same color as that on thesurface of the anti-fake material 1.

FIG. 11 a-FIG. 11 f are the drawings for the anti-fake fiber coated withtransparent material 7 in the anti-fake material 1, Because of thetransparency of transparent material 7, the part surface 3 with theconcave-convex shielding structure on the anti-fake fiber in thisinvention naturally presents on the surface of the anti-fake material.FIG. 11 a and FIG. 11 b show that the fibers respectively with theircross sections of single-triangle or single-quadrilateral are coatedwith the round transparent material 7, the purpose is to increase thefiber's compressive strength to further ensure the stability of thefiber's cross section shapes in the process of paper making or in theprocess of adding plastics; FIG. 11 c and FIG. 11 d show that the fibersrespectively with their cross sections of single-triangle orsingle-quadrilateral are coated with the flat transparent material 7,the purposes are not only to increase its compressive strength tofurther ensure the stability of the fiber's cross section shapes in theprocess of paper making or in the process of adding plastics, but alsoto ensure the A and B surfaces, even if the fiber is not bended,presented simultaneously on the surface of the anti-fake material; FIG.11 e and FIG. 11 f show that the fibers respectively with their crosssections of multi-triangle or multi-quadrilateral are coated with theflat transparent material 7, the purpose is to increase fiber'scompressive strength to further ensure the stability of the fiber'scross section shapes in the process of paper making or in the process ofadding plastics.

FIG. 12 a-FIG. 12 e are the cross section drawings for the vacuum-coatedaluminum layer with shielding function between the color pattern A andthe color pattern B on the anti-fake fiber 2. We found in our practicesthat: because of the fiber in very small size, when using organicmaterial to prepare the fiber, the colors interfere with each otherbetween the color patterns A and B, resulting in seriously-influencedbeauty of the color patterns A and B, and reduced visual differencebetween the color patterns A and B. For solving this problem, we designan Al-coated layer 8 between the color patterns A and B, becauseAl-coating is not only at low cost, but also has completely-shieldingfunction when the Al-coated layer is only 0.2 μm in its thickness. FIG.12 a is a drawing of the fiber with its triangle cross section and anAl-coated layer 8 located in the middle position on the material, whichis equal to a composition made of two fibers in different colors, theinterface of this composition is coated by aluminum; FIG. 12 b is adrawing of the fiber with its triangle cross section and an Al-coatedlayer 8 located on the fiber's surface, after coating aluminum thefiber's surface can also be adhered with a layer of color or is onlykept with this aluminum layer; FIG. 12 c is a drawing of the fiber withits quadrilateral cross section and an Al-coated layer 8 located in themiddle position on the material, the interface between two differentcolors on this composition is coated by aluminum; FIG. 12 d is a drawingof the fiber with its quadrilateral cross section and an Al-coated layer8 located on the fiber's surface, the Al-coated layer 8 is located onone side of the axis 5 on the surface, after coating aluminum thefiber's surface can also be adhered with a layer of color or is onlykept with this aluminum layer; FIG. 8 e is a drawing of the fiber withits multi-linked triangle cross section and the Al-coated layer 8located on the surfaces B1, B2, B3 of the triangles with the same visionon the anti-fake fiber. In addition, the surface of whole anti-fakefiber can be coated with aluminum first, and then the color patterns Aand B are printed on the relative surfaces.

The said concave-convex shielding structure can be in arc shape, seeFIG. 13, and also can be in saw teeth shape or other irregular curveshapes.

In the above embodiments, the anti-fake materials are the organic films.Previously, no one has added the anti-fake fiber into the plastic filmsfor anti-fake functions, the reason for it is that the plastic films aredifficult to tear and easy to melt with the anti-fake fibers, thus thereis difficult to tear the plastic film or to pick the anti-fake fiber outfor checking the anti-fake fiber. When the faker simulates the visualfeatures via printing fine line, there is no simple way to verify.Because it is unnecessary to tear the plastic films for observing inthis invention, it can be used in plastic film areas.

In the above embodiments, the anti-fake fiber is a fluorescent fiber,when illuminating via fluorescent lamp and changing observing angle,there will be obvious visible visual difference.

In the above embodiments, the anti-fake fiber is an IR fiber, whenilluminating via IR-ray and changing observing angle, there will beobvious visible visual difference.

The way for controlling the part surface 3 of the anti-fake fiberpresented on the surface of the anti-fake material is as follows:

For realizing the objectives of this invention, the most importanttechnique is to control efficient concave-convex shielding structure ofthe fiber being really presented on the surface of the anti-fakematerial in the practical production process. Theoretical analysis and alarge amount of experiments indicate that: in the paper making process,when the fiber has certain elastic hardness, the maximum projection areaof the whole fiber shape will certainly present on the surface of thepaper. In this invention, the projection area of the anti-fake fiberrefers to the minimum square area corresponded to the projective line ofthe substance, that is, when the anti-fake fiber is in straight line andthe fiber's cross section is equivalent in the length direction, theminimum square area is the area of the projective lines of thesubstance, see the area covered by bevel lines in FIG. 14 a; when theanti-fake fiber is in straight line and the fiber's cross section is notequivalent in the length direction, the minimum square area is theproduct area of the maximum width of the projective area of theanti-fake fiber substance and the length of the anti-fake fiber, see thearea covered by bevel lines in FIG. 14 b; when the anti-fake fiber is incurve, the minimum square area is just the square area constituted ofand covered by the projective lines of the bended substance of theanti-fake fiber, see the area covered by bevel lines in FIG. 14 c.

Another description has the same effects as that mentioned above, whento envelop the anti-fake fiber 2 by a cube can fully wrap the partsurface 3 of the anti-fake fiber, which is corresponded by two maximumsurfaces in minimum cube of the anti-fake fiber, the two maximumsurfaces of the minimum cube are certainly towards to the surface of theanti-fake material because of their lowest energy status, therefore, thepart surface 3 with the concave-convex shielding structure on it canpresent on the surface of the anti-fake material.

Accordingly, this invention designs especially as follows, these designsare also applicable to distribute the anti-fake fiber into a sandwichwith a paper in it, or distribute it into a sandwich with a plastic filmin it, or distribute it into a single-layer plastic film.

The anti-fake fiber 2 is in curve shape, the upward surface of thebended fiber is the part surface 3 of the anti-fake fiber, see FIG. 15 aand FIG. 15 b. The maximum width c of the cross section of the anti-fakefiber, in its length direction and being parallel to the surface of theanti-fake material, is equal to or less than the maximum width d of thecross section being vertical to the surface of the anti-fake material,that is, the long axis d of the cross section in the length direction ofthe anti-fake fiber 2 is vertical to the surface of the anti-fakematerial, see FIG. 15 b, thus when the fiber is in bended status, itscross section, even if not in flat shape, can still expose the necessarypart surface 3 of the anti-fake fiber onto the paper's surface. Themaximum horizontally-surmounted length formed by the bended anti-fakefiber 2 is a geometrical width e, see FIG. 15 a, when this geometricalwidth is at least over twice of the long axis d of the cross section inthe length direction of the anti-fake fiber, the bended anti-fake fiber2 can completely present on the surface of the anti-fake material in itsnaturally-bended status.

If the cross section of the anti-fake fiber 2 has at lease its some part9 in flat shape in the fiber length direction, the flat surfacecorresponded to the flat shape will present on the surface of theanti-fake material, see FIG. 16. The cross section of the anti-fakefiber 2 in its length direction can also be fully in flat shape, thusthe flat surface corresponded to this flat shape will present on thesurface of the anti-fake material. The color of the flat part of theanti-fake fiber 2 is preferably blank or white in color, or the samecolor as that on the surface of the anti-fake material 1.

The materials of the anti-fake fiber in this invention can be organic ormetal ones.

The anti-fake material in this invention refers to paper, orpaper-board, or organic film. The anti-fake fiber 2 can be sandwichedbetween two pulp layers, or between two organic films; or between pulplayer and other material layer; or between organic film layer and othermaterial layer; or can be adhered onto the surface of an anti-fakematerial, or can be inserted into the surface of the anti-fake materialin other ways.

Various concave-convex structures of the anti-fake fibers in thisinvention can be formed via dies. The color patterns on theconcave-convex structures can be prepared onto the anti-fake fibers byprocesses of adhering film, fine-printing, heat-pressing and etc.; forthe color pattern with pure colors, it can be prepared first by jettingand then synthesizing, and also can be composed by heat pressing fibersin different colors.

The anti-fake fiber can be inserted into paper by directly adding itinto pulp in the process of papermaking, and can also be done bypressing it into multi-layers of paper.

1-20. (canceled)
 21. An anti-fake material, on which an anti-fake fiber(2) is distributed and a part surface (3) of said anti-fake fiber (2) ispresented on a surface (1′) of said anti-fake material (1),characterized in that: there is provided a concave-convex shieldingstructure on said part surface (3), on which there are at least twocolor patterns A and B distributed, there is obvious visual differencebetween said at least two color patterns A and B on said part surface(3), so that, on the surface (1′) of the anti-fake material (1) withpresence of said part surface (3), when said part surface (3) isobserved from different observing angles, the color patterns A and B canbe seen respectively.
 22. The anti-fake material as claimed in claim 21,characterized in that: there are at least two observing angles a and bon the surface (1′) of the anti-fake material (1) with presence of saidpart surface (3), the color pattern A can be seen if said part surface(3) of the anti-fake fiber (2) is observed from the observing angle abut the pattern B cannot be seen because it is shielded by theconcave-convex shielding structure on the part surface (3) of theanti-fake fiber (2), and the color pattern B can be seen if said partsurface (3) of the anti-fake fiber (2) is observed from the observingangle b but the pattern A cannot be seen because it is shielded by theconcave-convex shielding structure on the part surface (3) of theanti-fake fiber (2).
 23. The anti-fake material as claimed in claim 21,characterized in that: the concave-convex shielding structure of saidanti-fake fiber (2) comprises at least one triangle element at its crosssection (4), the color pattern A is on the surface (3′) of one bevelside at the top angle of said triangle element and the color pattern Bis on the surface (3″) of another bevel side at said top angle.
 24. Theanti-fake material as claimed in claim 22, characterized in that: theconcave-convex shielding structure of said anti-fake fiber (2) comprisesat least one triangle element at its cross section (4), the colorpattern A is on the surface (3′) of one bevel side at the top angle ofsaid triangle element and the color pattern B is on the surface (3″) ofanother bevel side at said top angle.
 25. The anti-fake material asclaimed in claim 23, characterized in that: the cross section (4) ofsaid anti-fake fiber (2) comprises one triangle or multi-linkedtriangles.
 26. The anti-fake material as claimed in claim 24,characterized in that: the cross section (4) of said anti-fake fiber (2)comprises one triangle or multi-linked triangles.
 27. The anti-fakematerial as claimed in claim 23, characterized in that: said anti-fakefiber (2) is a bended fiber with a triangle cross section (4), the colorpatterns A and B are respectively located on bevel surfaces of two sidesof the triangle, the color on surface corresponding to a third side iswhite or the same color as that of the said anti-fake material (1)surface, and the anti-fake fiber (2) is bended along withequally-divided axis (5) between said two sides.
 28. The anti-fakematerial as claimed in claim 23, characterized in that: the crosssection of said anti-fake fiber (2) comprises one quadrilateral ormulti-linked quadrilaterals, and the anti-fake fiber (2) is bended alongwith equally-divided axis (5).
 29. The anti-fake material as claimed inclaim 23, characterized in that: the cross section of said anti-fakefiber (2) comprises one trapezoid or two-linked trapezoids.
 30. Theanti-fake material as claimed in claim 21, characterized in that: saidpart surface (3) of said anti-fake fiber (2) has its projection on thesurface of the anti-fake material (1) in the maximum projection size ofthe anti-fake fiber (2) or is parallel to its maximum projection. 31.The anti-fake material as claimed in claim 22, characterized in that:said part surface (3) of said anti-fake fiber (2) has its projection onthe surface of the anti-fake material (1) in the maximum projection sizeof the anti-fake fiber (2) or is parallel to its maximum projection. 32.The anti-fake material as claimed in claim 23, characterized in that:said part surface (3) of said anti-fake fiber (2) has its projection onthe surface of the anti-fake material (1) in the maximum projection sizeof the anti-fake fiber (2) or is parallel to its maximum projection. 33.The anti-fake material as claimed in claim 21, characterized in that:said anti-fake fiber (2) is a bended or crooked fiber being able topresent on the surface of the anti-fake material (1) in self-bended orself-crooked status.
 34. The anti-fake material as claimed in claim 22,characterized in that: said anti-fake fiber (2) is a bended or crookedfiber being able to present on the surface of the anti-fake material (1)in self-bended or self-crooked status.
 35. The anti-fake material asclaimed in claim 23, characterized in that: said anti-fake fiber (2) isa bended or crooked fiber being able to present on the surface of theanti-fake material (1) in self-bended or self-crooked status.
 36. Theanti-fake material as claimed in claim 21, characterized in that: thecross section of said anti-fake fiber (2) is in flat shape along withits full length or its partial length direction, and said part surface(3) of said anti-fake fiber (2) is located on the flat surface or on thesurface of the anti-fake fiber (1) having their same projection on theanti-fake material (1).
 37. The anti-fake material as claimed in claim22, characterized in that: the cross section of said anti-fake fiber (2)is in flat shape along with its full length or its partial lengthdirection, and said part surface (3) of said anti-fake fiber (2) islocated on the flat surface or on the surface of the anti-fake fiber (1)having their same projection on the anti-fake material (1).
 38. Theanti-fake material as claimed in claim 23, characterized in that: thecross section of said anti-fake fiber (2) is in flat shape along withits full length or its partial length direction, and said part surface(3) of said anti-fake fiber (2) is located on the flat surface or on thesurface of the anti-fake fiber (1) having their same projection on theanti-fake material (1).
 39. The anti-fake material as claimed in claim21, characterized in that: the outside of said anti-fake fiber (2) iscoated with a transparent material (7), the transparent material (7) isin a flat shape, and said part surface (3) of said anti-fake fiber (2)is on the surface of the anti-fake fiber (2) corresponding to thetransparent material (7).
 40. The anti-fake material as claimed in claim22, characterized in that: the outside of said anti-fake fiber (2) iscoated with a transparent material (7), the transparent material (7) isin a flat shape, and said part surface (3) of said anti-fake fiber (2)is on the surface of the anti-fake fiber (2) corresponding to thetransparent material (7).
 41. The anti-fake material as claimed in claim23, characterized in that: the outside of said anti-fake fiber (2) iscoated with a transparent material (7), the transparent material (7) isin a flat shape, and said part surface (3) of said anti-fake fiber (2)is on the surface of the anti-fake fiber (2) corresponding to thetransparent material (7).
 42. The anti-fake material as claimed in claim21, characterized in that: said anti-fake material (1) is an organicfilm.
 43. The anti-fake material as claimed in claim 21, characterizedin that: said anti-fake fiber (2) also includes the fiber made by oneadded with fluorescent material or IR-illumining material.
 44. Theanti-fake material as claimed in claim 22, characterized in that: saidanti-fake fiber (2) also includes the fiber made by one added withfluorescent material or IR-illumining material.
 45. The anti-fakematerial as claimed in claim 21, characterized in that: between surfaceslocated by said at least two color patterns A and B, there is at leastone layer of vacuum-coated aluminum for shielding light.
 46. Theanti-fake material as claimed in claim 22, characterized in that:between surfaces located by said at least two color patterns A and B,there is at least one layer of vacuum-coated aluminum for shieldinglight.
 47. The anti-fake material as claimed in claim 23, characterizedin that: between surfaces located by said at least two color patterns Aand B, there is at least one layer of vacuum-coated aluminum forshielding light.
 48. The anti-fake material as claimed in claim 24,characterized in that: between surfaces located by said at least twocolor patterns A and B, there is at least one layer of vacuum-coatedaluminum for shielding light.
 49. An anti-fake fiber inserted into theanti-fake material as claimed in claim 21, which has the part surface(3) presented on one surface (1′) of said anti-fake material (1),characterized in that: said part surface (3) has the concave-convexshielding structure, on which there are at least two color patterns Aand B distributed, said at least two color patterns A and B have obviousvisual difference on said part surface (3), resulting that the colorpatterns A and B can be seen respectively from the surface (1′) of theanti-fake material (1) with the presence of said part surface (3) whenobserved from different angles of said part surface (3).
 50. Theanti-fake fiber as claimed in claim 49, characterized in that: there areat least two observing angles a and b on the surface (1′) of theanti-fake material (1) with presence of said part surface (3), the colorpattern A can be seen if said part surface (3) of the anti-fake fiber(2) is observed from the observing angle a but the color pattern Bcannot be seen because it is shielded by the concave-convex shieldingstructure on the part surface (3) of the anti-fake fiber (2), and thecolor pattern B can be seen if said part surface (3) of the anti-fakefiber (2) is observed from the observing angle b but the color pattern Acannot be seen because it is shielded by the concave-convex shieldingstructure on the part surface (3) of the anti-fake fiber (2).
 51. Theanti-fake fiber as claimed in claim 49, characterized in that: said partsurface (3) has its projection on said anti-fake material (1) in themaximum projection size of the anti-fake fiber (2) or is parallel to themaximum projection.
 52. The anti-fake fiber as claimed in claim 50,characterized in that: said part surface (3) has its projection on saidanti-fake material (1) in the maximum projection size of the anti-fakefiber (2) or is parallel to the maximum projection.
 53. The anti-fakefiber as claimed in claim 49, characterized in that: said anti-fakefiber (2) is a bended or crooked fiber being able to present on thesurface of the anti-fake material (1) in self-bended or self-crookedstatus.
 54. The anti-fake fiber as claimed in claim 50, characterized inthat: said anti-fake fiber (2) is a bended or crooked fiber being ableto present on the surface of the anti-fake material (1) in self-bendedor self-crooked status.
 55. The anti-fake material as claimed in claim49, characterized in that: the cross section (4) of said anti-fake fiber(2) is in flat shape along with its full length or its partial lengthdirection, and said part surface (3) of said anti-fake fiber (2) islocated on the flat surface or on the surface of the anti-fake fiberhaving their same projection on the anti-fake material.
 56. Theanti-fake material as claimed in claim 50, characterized in that: thecross section (4) of said anti-fake fiber (2) is in flat shape alongwith its full length or its partial length direction, and said partsurface (3) of said anti-fake fiber (2) is located on the flat surfaceor on the surface of the anti-fake fiber having their same projection onthe anti-fake material.